PHP · Theory

crc32()

← All stacks

Theory

190/352

crc32()

crc32() is simple if you keep it on paper. Ananya uses it for crc32 on Ananya's board in a first job task.

Keep crc32() small. Ananya should finish crc32 on Ananya's board in a few lines, not a 40-line dump.

crc32() exists so Ananya can keep crc32 on Ananya's board correct in a first job task.

Use crc32() when crc32 on Ananya's board must stay clear. If a simpler PHP step works, use that instead.

crc32() trap — only reciting the name of crc32. Ananya loses marks for that every viva.

Place crc32() next to nearby PHP work — one crc32 step Ananya can write from memory is the link.

One breath for crc32(), then crc32 on Ananya's board, then only reciting the name of crc32. Sit down.

Exam tip

Say crc32() in one breath, then one crc32 step Ananya can write from memory, then only reciting the name of crc32.

Example

<?php
// crc32()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

crc32(): scores array, print avg, then high marks. Say the output.

Short notes

Defcrc32() — Ananya uses it for crc32 on Ananya's board in a first job task.
Rulecrc32() → one crc32 step Ananya can write from memory.
Remembercrc32() + Apache/Nginx (a first job task).
Usecrc32() in a first job task (crc32 on Ananya's board).
Trapcrc32() — only reciting the name of crc32.
Excrc32() → crc32 on Ananya's board.

PHP · Theory

crc32()

← All stacks

Theory

190/352

crc32()

crc32() is simple if you keep it on paper. Ananya uses it for crc32 on Ananya's board in a first job task.

Keep crc32() small. Ananya should finish crc32 on Ananya's board in a few lines, not a 40-line dump.

crc32() exists so Ananya can keep crc32 on Ananya's board correct in a first job task.

Use crc32() when crc32 on Ananya's board must stay clear. If a simpler PHP step works, use that instead.

crc32() trap — only reciting the name of crc32. Ananya loses marks for that every viva.

Place crc32() next to nearby PHP work — one crc32 step Ananya can write from memory is the link.

One breath for crc32(), then crc32 on Ananya's board, then only reciting the name of crc32. Sit down.

Exam tip

Say crc32() in one breath, then one crc32 step Ananya can write from memory, then only reciting the name of crc32.

Example

<?php
// crc32()
$scores = [80, 90, 70];
$avg = array_sum($scores) / count($scores);
echo "avg=" . number_format($avg, 1) . "\n";
foreach ($scores as $s) {
  if ($s >= 80) echo "high: $s\n";
}

crc32(): scores array, print avg, then high marks. Say the output.

Short notes

Defcrc32() — Ananya uses it for crc32 on Ananya's board in a first job task.
Rulecrc32() → one crc32 step Ananya can write from memory.
Remembercrc32() + Apache/Nginx (a first job task).
Usecrc32() in a first job task (crc32 on Ananya's board).
Trapcrc32() — only reciting the name of crc32.
Excrc32() → crc32 on Ananya's board.

crc32()

Example

Short notes

Questions

crc32()

Example

Short notes

Questions